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seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the operation 
mode. From the above judgment, the decided operation will start operate earlier than the set time as shown below. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Timer Signal Receiving sound During Operation. 

 

 
Timer Signal Receiving Sound When the Air Conditioner Stops. 

 

 

● The Compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on 

again by pressing OFF/ON button at remote control within this period. 

● This control is not applicable if the power supply is cut off and on again. 
● This phenomenon is to balance the pressure inside the refrigerant cycle.

 

● Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation 

although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the 
OFF/ON button at the remote control is permitted or the Auto OFF/ON button at indoor unit. 

●  The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a full 

cycle and return back to the outdoor unit. 

1.  If the outdoor unit total running current is detected exceeding I

1

(A), the frequency instructed for compressor 

operation will be decreased. 

2.  If the running current does not exceed I

1

(A) for 5 seconds, the frequency instructed will be increased. 

YE9MKE YE12MKE  YE18MKE 

Operation mode 

I

1

(A) I

1

(A) I

1

(A) 

Cooling/ Soft Dry /Fan A* 

5.03 

6.35 

8.98 

Cooling/ Soft Dry /Fan B 

4.89 

6.22 

8.00 

Heating  

4.75 

6.22 

9.31 

 

*The first 30 minutes of cooling operation, A will be applied. 

35 

34 

 

(For RE9MKE,RE12MKE)                                                  (RE18MKE) 

1.  DC Peak Current Control 

●  When electric current to IPM exceeds set value of DC17.3 1A, the compressor will stop. It will restart after 

three minutes. 

●  If the set value is exceeded again within 30 seconds, the operation will restart after one minute. 
●  If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off. 
●  Error code [F99] will be displayed. 

2.    Overheating protection control 

When the IPM temperature rises to 112 ℃ , compressor will stop immediately. 
Compressor restarts after three minutes if the temperature decreases to 97℃ 

 
 
Instructed frequency for compressor operation will be regulated compressor discharge temperature. The change of 
frequency is as below. 

 
 

 
 
 
 
 
 
 
 
 

1. When the conditions listed in the table occur, the compressor stops and restarts after three minutes. 
2.  If this continuously occurs for twice within 20 minutes, all indoor and outdoor relays will be cut off. 
3. This control is not applicable for deice operation. 
 

Comp Frequency 

45 Hz or above

64 Hz or above 

58 Hz or above 

73 Hz or above 

Total Outdoor Current 

1b≤1＜3 1b≤1＜1.6 1b≤1＜1.3 1b≤1＜1.6 

Indoor Piping Temp 

20 ℃ or above 

25 ℃ or less 

20 ℃ or above 

25 ℃ or less 

Operation Mode 

Cool/Dry 

Heat 

Cool/Dry 

Heat 

Model YE9MKE 

YE12MKE 

If all following conditions exists, the compressor will run with the frequency of 40 Hz (YE9MKE,YE12MKE) or 30Hz 
(YE18MKE) 

Models YE9MKE, 

YE12MKE 

YE18MKE 

Intake Air Temp. 

≥30 ℃ or ＜15 ℃ 

------------------- 

≥30 ℃ or ＜14 ℃ 

≥28 ℃ or ＜14 ℃ 

Outdoor Temp. 

≥38 ℃ or ＜16 ℃ 

≥24 ℃ or ＜4 ℃ 

≥38 ℃ or ＜13 ℃ 

≥24 ℃ or ＜4 ℃ 

Indoor Piping Temp. 

＜30 ℃ 

≥0 ℃ 

＜30 ℃ 

≥0 ℃ 

Operation Mode 

Cool / Dry 

Heat 

Cool/ Dry 

Heat 

a. Control start conditions 

• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A. 
• During Cooling and Soft Dry operations: 

39 ℃ 

39 ℃ 

39 ℃ 

38 ℃ 

Outdoor temperature 

RE9/12MKE 

112 ℃

112 ℃ 

110 ℃ 

100 ℃ 

RE18MKE 

35 

Indoor suction temperature - indoor piping temperature is below 4℃. 
Indoor temperature and outdoor temperature is 30±5℃. 
Remote Control setting 16℃ and Hi Fan Speed. 

• During Heating operations: 

Indoor piping temperature - indoor suction is under 5℃. 
Indoor temperature and outdoor temperature is 20 ± 2℃. 
Remote control setting 30℃ and Hi Fan Speed. 

b. Control contents 

• Compressor stops (and restart after 3 minutes) 
• If the conditions above happen 2 times within 20 minutes, the unit will: 
- Stop operation 
- Timer LED blinks and “F91” indicated 

• The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the 

diagram below. 

• This control will begin 1 minute after the compressor starts. 
• Compressor frequency will adjust base on outdoor air temperature. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
                      RE9MKE, RE12MKE                                                                          RE18MKE 

1 .Frequency of the compressor 

For prevention of freezing of the indoor evaporator, the frequency of the compressor will be changed according to 

the indoor piping temperature. 
 
 
 
 
 
 
 
 
 
2 .Indoor Fan Control 

Indoor fan speed changes according to the indoor piping temperature. 

 
 
 
 
 
 
 
 

• To prevent dew formation at indoor unit discharge area. 

Outdoor air temp.( ℃.) 

38 

25 

18 

11 

free 

Free    

38    

26  

16  

37

22

15

8

Outdoor air temp.( ℃.)

38

25

18

11

free 

16    

26    

37   

47   

37

22

15

8

9℃. 
8℃. 
6℃. 
0℃. 

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• This control starts if all conditions continue for 20 minutes: 

- Operated with Cooling or Soft Dry Mode. 
- Indoor intake temperature is between 25℃ and 29℃. 
- Outdoor air temperature is less than 30℃. 

• This control stopped then receive air swing change signal from Remote Control. 

The frequency for the compressor will change according to the outdoor piping temperature. 

 

 
 
 
 
 
 
 
 
 
 
 
 

1. Indoor fan is controlled by the indoor piping temperature. 

●  Manual Fan Speed 

 

Piping Temperature(℃) 

K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 K10

K11

16 19 24 32 32 36 36 39 54 54 57  60 

 

●   Auto Fan Speed 
 
 

 

2. During heating operation, the indoor fan will run at the following speed when the compressor stops.

 

 

3. Hot Start 
When the heating operation starts, the indoor fan stops and the compressor runs with a certain frequency. 
This is to prevent the cold airflow from blowing. 
If the piping temperature rises to 19 ℃, and the indoor fan speed and airflow direction varies with the indoor piping 
temperature, the hot start control is completed.

 

The frequency for the compressor is determined by indoor piping temperature. 
 

K7 

Fixed 

+15rpm/s 

Free 

63℃

.

Outdoor pipe Temp.

61℃

60℃

56℃

RE9MKE, RE12MKE

RE18MKE

58℃

Max:40 Hz   Min 30Hz 

K8 

460